Once installed, it should show platform .162 and OS version .132, but 5.0 is definitely there.
To check this: Go to options > advanced > applications > bb button > modules. You should see files with 5.0.0.90 beside them.(If you get just the Java, it will show .132 with whatever platform you are installing it over. This is why some are getting .132 with a different platform than 162 on your phone)

Changes made (that I can recall)
(I have not noticed any graphical changes or new features yet, that I've been able to load)
- Browser
- Fonts
- Process Launcher
- App Console
- Call Control
- Language files
and I Shrunk it, as usual.

[5.0 Files included and working with this install: 46) "HEY... THERE'S MORE FILES NOW THAN WHEN I ORIGINALLY INSTALLED IT, WHAT GIVES!?"
Solution: Just re-download the installer/.rar and install again
Note: the .rar tends to be more updated as its smaller and easier to make (just copy and paste the files in your Java folder and run Loader, it should update some stuff)

KEEP IN MIND THIS WAS MADE USING THE BOLD 9000 5.0.0.90 LEAK
All that being said, install instructions below

if you're upgrading from .122
- Make sure .132 is installed.
- Run the Installer and Click Install
- Update.

if you're upgrading from .113
- Make sure .113 is installed.
- Run the Installer and change: 9530-v4.7.0.132_P4.0.0.162 to 9530-v4.7.0.113_P4.0.0.144
- Update.

if you're upgrading from .122
- Make sure .122 is installed.
- Run the Installer and change: 9530-v4.7.0.132_P4.0.0.162 to 9530-v4.7.0.122_P4.0.0.153
- Update.

if you're upgrading from stock .75/.76
- Download 132 Leak
- Install that, then get the Hybrid installer
- Install using the installer that corresponds to your Windows OS
- Update
(This is why: Only reason .132 is required to go from stock is so that you have a registered upgraded OS installed on your PC (mainly in your registry). You then upgrade that one to become .V4/5.0)

if you're upgrading from .109
- At Install screen, in the textbox beneath Destination Folder, change: 9530-v4.7.0.132_P4.0.0.162 to 9530-v4.7.0.109_P4.0.0.136
- Install using the installer that corresponds to your Windows OS
- Update

if you're upgrading from anything lower:
- At Install screen, in the textbox beneath Destination Folder, change: 9530-v4.7.0.132_P4.0.0.162 to 9530-v4.7.0.###_P4.0.0.###, where the #s are replaced by your version and platform
- Install using the installer that corresponds to your Windows OS
- Update

If the update doesn't show up:
- Delete the Vendor.xml file, as this is the cause of many people's updates not showing up
its in: "C:\Program Files\Common Files\Research In Motion\AppLoader"
- Make sure you have .132 installed or you changed the Browse folder to your latest OS folder (See above)
- Make sure you are using the right installer: x86 = 32-bit and x64 = 64-bit

FAQ:
After extracting the files I get a "Windows cannot find 'C:\Program'. Make sure you typed the name correctly, and then try again." error. What is wrong?

This cannot find the file error is just windows not being able to auto-load the Loader.exe file to update. If you open Loader.exe yourself or use Desktop Manager, you should be fine. It is located at: "C:\Program Files\Common Files\Research In Motion\AppLoader\Loader.exe" (Program Files (x86) for 64-bit users)